Rotary drier



Dec. 10, 1929. w. A. HARTY ET AL ROTARY DRIER Filed Jan. 18, 1927 3 Sheets-Sheet l Dec. 10, 1929. w HARTY ET AL 1,738,826

ROTARY DRIER Filed Jan. 18, 1927 3 Sheets-Sheet 2 Dec. 10, 1929. w. A. HARTY ET AL ROTARY DRIER Filed Jan. 18, 1927 3 Sheets-Sheet 5 Daventozp Fqagckhfflbore il illlalnflfiarl Patented Dec. 10, 1929 tries WILLIAM A. HARTY, OF BUFFALO, NEW YGHK, AND FRANK W. MOORE, OF THOROLD, @N'IARIO, CANADA, ASSIQrNUBE TO d CO. INC (IF BUFFALO, NEW YORK, A

JORPORATION OF NEVT YORK Application filed January 18, 19M.

The present invention involves certain improvements over and refinements upon the hot mandrel rotary drier shown in the Harty- Moore Reissue Patent No. 16,265, granted 5 February 16, 1926, to which reference is made as illustrating the particular type of drier involved herein.

While our original drier was remarkable in its performance, we have been able to produce driers of even greater efficiency.

The embodiment shown in the accompany ing drawings is well illustrative of the features involved in our present drier. The construction and operation of this drier is described in the following specification, and

the characteristic features of novelty are particularly pointed out in the appended claims.

Throughout the specification and drawings like reference characters are employed to in 29 dicate corresponding parts, and in the drawings:

Fig. 1 is an elevation showing the assembly of detachable units with the main units of the drier, in accordance with our present in- 5/35 vention.

Fig. 2 is an end elevation thereof.

Fig. 3 is a combined view presenting a side elevation and opposing end elevations of our detachable mandrel member.

Fig. 4 is an end view of a mandrel sup porting spider.

Fig. 5 is a plan view thereof.

Fig. 6 is a modification of our present invention and illustrates that manner of drier as assembled and installed.

Fig. 7 is a front end view thereof, and Figs. 8 and 9 are elevations showing the shell parts and the mandrel parts, respectively, separated and alined.

Preferably, our drier units are assembled in battery relation so that the individual units may be rotated from a common driving source and their burners may be fed from a common fuel supply. This also permits the products 5 of combustion from the individual drier units to be discharged into a common exhaust chamber connecting with a stack or flue as in our Letters Patent of June 8, 1926, No. 1,587,727.

Each drier unit consists of an outer shell, which as contemplated herein, is preferably ROTARY DRIER Serial No. 161,839.

made in sections. The intake section 1 at its intake end may be provided with any type of automatic material feed, as for example, that shown in our said reissue patent, or the drier shell may be fed by simply shoveling material by hand thereinto.

Certain of the shell sections are provided with the usual circumferential tires 3 which run in suitable traclrways in the supporting foundation for the drier, as shown in our previous patent, and the drier shell may be rotated as a unit in any suitable manner, as by gear, belt or sprocket. The adjacent ends of the shell sections are each provided with a circumferential flange 1 by means of which the sections may be accessibly fastened together in endwise assembly.

Centrally mounted within the drier shell is our hot core or mandrel which preferably extends the full length of the shell, but which in the present instance is made in sections corresponding to the length of the shell sections. For convenience of reference the mandrel section within the shell section 1 is indicated by the numeral 4 and that within the shell section 1 by the numeral 5, these sections being aligned with each other and formed to telescopically fit one within the other at their meeting ends.

The burner nozzle is so disposed as to project its flame into the projecting end of the mandrel section 5 at the intake end of the drier and the mandrel is heated throughout its entire length both by the direct contact of the flame which is projected far into said mandrel as well as by the conductivity of the metal employed, which is preferably cast iron.

In order to reduce vibration, as well as to provide convenient access for purposes of repair or replacement, we have devised a special form of mounting for the mandrel section 4 which receives the direct flame from the burner. The section 4 is held in a clamp 'l' which is attached to the shell 1 by arms '2' having bent ends 7 The mandrel section 5 in the shell section 1 comprises a hollow tubular member of a diameter corresponding to the major diameter of the mandrel section t in the shell sec-- '1 on the section 1 and telescopically receives the end of the mandrel section 4. This telescopic' connection as at permits the ends of either mandrel section to expand or contract independently of each other under extreme temperature changes. The mandrel sections 4 and 5 are preferably both provided with longitudinally extending ribs 5? for holding the material being dried in contact with the hot mandrel.

Our present drier thus presents a construction in which accessibility to the parts for purposes of repair or replacement is not only made most convenient, but in which the man- 'drel itself is so constructed and mounted as to reduce to the minimum the loosening efiect due to excessive vibration and to contraction and expansion under extreme temperature changes. v

a In the foregoing discussion we, have considered the drier as a unit. Inpractice, we

find the battery arrangement advantageous and in Figs. 6 and 7 have shown a battery embodiment embodying general principles important. in drying in yard or elsewhere when large amounts of material must be dried quickly. As shown in Figs. 6 and 7, such a battery comprises a frame F in which are a pair of convergingly and rotatably mounteddriers 10 and 20 with their respective shells 11 and 21 detachably connected by the couplings 10 and 20 A revolving drive is promoted by sprockets 11 2 and 22 on the driers 10 and 20. These sprockets are connected by drive chains 12 and 22 ,to a compound drive sprocket D, mounted on the frame F in any convenient intermediate position, as at B, and are disposed at right angles to a common center of each drier.

The driers 10 and 20 are provided at their either end with .racetires 13 and 23, which revolve over running rolls 13 and 23 as shown inFigs. 6 and 7, or in any properly provided way.

The transfer of the partially dried material from the upper to the lower drier is effected through a fixed feed transfer chute 29. r

A circulation of burner fed heat, is maintained'thro-ughout the main drier mandrels 14: and 24 and their respective attachable mandrels 15 and 25. The passage of drying heat from the lower to the upper drier mandrel is provided for by the introduction of a semi-circular bridge pipe 28, into which the opposing protruding ends of the mandrels of the upper and lower drier units are revolvably inserted. The bridge pipe 28 is supported by a bracket 28 and permits a complete circulation of heat to be drawn from the burner 26 through the heating mandrels and their connecting bridge pipe to the suction pump intake pipe 27.

Various modifications in the construction and operation of our drier may obviously be resorted to within the limits of the appended claims.

What we therefore claim and desire to secure by Letters Patent is:

1. In a drier, comprising an outer shell, consisting of a main section and a detachable end section, a mandrel carried by said main section, and an end mandrel removably mounted in the end section, mandrel supporting means in the end shell section adjacent the ends thereof, means for coupling the outer shell sections in alignment, said main and end mandrel sections having telescopic interengagement.

r 2. In a drier of the class described, a pair of reversed drier units, each conslsting of a rotary outer shell and hollow mandrel supported therein and extending therethrough, means for passing the material to be dried from the delivery end of one shell to the intake end of the other shell, means for connecting the heat mandrels in fine relation, and means for rotating the shells.

3. In a drier of the class described, a plurality of superimposed inclined drier units, each consisting of a rotary shell and an internal hollow heating mandrel supported therein and extending therethrough, said units being each inclined for gravity feed through its shell, a transfer chute operatively connecting the delivery end of one shell with the intake end of a lower shell, and a fixed heat flue having end bearings for an upper and lower mandrel end, in heat transmitting relation, and means for rotating the shells.

1-. A drier comprising a rotary shell and a hollow'conductive mandrel extending therethrough and including an expansibly jointed end section, the drier shell also including an end section detachable adjacent said mandrel joint.

In testimony whereof we affix our signatures.

WILLIAM A. HARTY. FRANK W. MOORE. 

